Bolt-clipper.



H. K. PORTER.

BOLT CLIPPER. APPLICATION FILED AUG. 1, 1908.

Pa tented Jan. 12, 1909.

THE NORRIS PETERS 60., wgmivgrmv, n. 1C;

HENRY K. PORTER, OF CHELSEA, MASSACHUSETTS.

BOLT-CLIPPER.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed August 1, 1908. Serial No. 446,40.

T 0 all whom it may concern:

Be it known that I, HENRY K. PORTER, a citizen of the United States, residing at Che-lsea, in the county of Middlesex and State of Massachusetts, have invented or discovered certain new and useful Improvements in Bolt-Clippers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain improvements in bolt cutters or clippers of the class set forth in U. S. Patents Nos. 484,670; 720,835; 830,453, and 862,279; the invention having for its object to simplify and improve the construction of certain parts, so that they may be more cheaply manufactured and be stronger and more efficient in use than the constructions of similar parts in the old devices, and also to provide means which will prevent the work from becoming displaced from proper position in the cutting jaws when the cutting operation is effected.

In the accompanying drawings, Figure 1 is a side view of a pair of bolt clippers embodying one feature of the present invention. Fig. 2 is a plan view of the same. Fig. 3 is a longitudinal section of the same on line 33, Fig. 1. Fig. 4 is a front end view of the same. Fig. 5 is a detail side view of one of the adjusting levers, and Fig. 6 is an edge view of the same. Fig. 7 is a partial side view showing the construction of the forward end of the device which will be preferably employed in the clippers shown in Fig. 1. Fig. 8 is a detail section on line 88, Fig. 7, and Fig. 9 is a similar section showing a slightly difierent construction from that illustrated in Fig. 8.

Referring to the drawings, 12 denotes the handle-levers which are pivotally oined together by a fulcrum-bolt 18. The cutting jaws or levers 14:, fulcrumed on the bolts 15 passing through said levers and through side straps 16, are connected with the handlelevers 12 by means of adjusting levers 17 which are pivotally connected with the said handle levers by the bolts 18 and with the said cutting levers by the bolts 19, said jaws or levers preferably having toothed gear engagements with each other, as is usual. The cutting levers 14 are also provided, as usual, with cutters 20, and the cutting edges of the said cutters may be brought into proper relation with each other, and this relation may be varied to compensate for wear, by the adjustments afforded by the said adjusting levers.

The positions of the adjusting levers relative to the handle levers and cutting levers is varied by means of adjusting screws 21 and 22. The adjusting screws 21 are tapped in lugs 23, on the outer sides of the handle levers 12, and bear against abutments 24. on the said adjusting levers. The adjusting screws 22 are tapped in the said adjusting levers and abut against the handle levers as indicated in dotted lines in the lower part of Fig. 1, to effect the adjustment as clearly set forth in Patent No. 862,279, above referred to. By providing two adjusting screws 21 and 22 for each of said adjusting levers the positions of the latter may be changed, as may be desired; and when the proper adjustments have been effected the said ad usting levers may be rigidly secured in place relative to the other parts, so that there will be no looseness of movement.

By reference to Figs. 3 and 6 of the drawings it will be seen that the adjusting-levers are recessed or forked at their ends for the reception of the cutting levers and handle levers with both of which said adjustinglevers have pivotal or jointed connections. This construction provides adequate strength for said adjusting levers with the other levers at the ointed points referred to, in that said adjusting levers have two arms or lugs at each of their pivotal points or joints. It is to enable the convenient use of these ad justing-levers having forked jointed connections with the handle-levers that the latter are preferably provided with the lugs 23, for the reception of adjusting screws 21, and this construction necessitates thatthe adjusting levers should be provided with the abutment lugs 24- engaged by the points of said screws. The adjusting levers, forked at their points of connection with the handle-levers might, however, be used with adjusting screws arranged differently than those above referred to.

To prevent the work from slipping inward towards the fulcrums of the cutting levers, in the cutting operation yielding abutments for the work are preferably provided in the strap 16. To this end the said straps may be provided with recesses 25 in which are'housed bow springs 26 which the I at which said adjusting levers have jointed work will come in contact with as it has a tendency to move inward, and which will therefore serve as yielding stops for the work.

By reference to Fig. 7 it will be seenthat the spring stops or yielding abutments, consisting of the bow-springs 26, slightly overlap, at their central or acting portions, the rear ends of the cutting edges of the cutters 20, and that they act resistingly in the direction of the lengths of said edges to prevent the inward movement of the work in the line of the said edges.

Instead of making the straps solid, as shown in Fig. 8, each of said straps may consist of an inner plate 26 and an outer plate 27 having a flange or lip 28 as shown in Fig. 9; this construction afl'ording hous ings for the bow springs, as will be understood. Any other suitable yielding abutments for the work, and held in place by the straps 16, may be provided instead of the bow springs just referred to. For example, the said straps might be provided at their central parts with rounded enlargements to receive spiral springs acting on yielding plungers which would serve the same purpose as the bow springs 26. 7

From the foregoing it will be understood that the invention provides an improved form of bolt clipper which is inexpensive to manufacture, and which will be convenient and efficient in use.

Having thus described my invention I claim and desire to secure by Letters Patent:-

1. In a bolt cutter, the combination with the handle-levers 12 provided on their outer parts with lugs 23, of the cutting levers 14, the adjusting levers 17 provided with forks connections with said handle-.leversand cutting-levers, screws tapped in said adjusting levers and abutting against said handle levers, and screws tapped in said lugs and abutting against said adjusting levers.

2. In a bolt cutter, the combination with the cutting jaws or levers and means for operating same, of straps on the opposite sides of said cutting jaws or levers and on which the fulcrum pivots of said levers are mounted, said straps being provided with recesses, and yielding abutments received in the recessed portions of said straps and serving to prevent the work from inward displacement when acted on by the cutters with which said cutting levers are provided.

3. In a bolt cutter, the combination with the cutting jaws or levers and means for operating the same, of straps on the opposite sides of said jaws or levers, said straps being provided with recesses, bow-springs mounted in'said recesses and serving as yielding abutnients to prevent inward displace ment of the work, and pivot-bolts for said levers mounted on said straps.

4. In a cutting implement, the combination with cutting jaws or levers, of side straps in which said jaws or levers are pivoted, and one or more bow springs mounted in one or both of said straps and arranged to act resistingly in the line of the cutting edges of the cutters and thus prevent improper inward displacement of the work when acted on by the cutters.

In testimony whereof I affix my signa ture, in presence of two witnesses.

HENRY K. PORTER. Witnesses:

JAMES IV. BRIGGS,

BOARDMAN B. MERRILL. 

